Finding the Fourth Proportional to 22,419.78, 30,939.50 and 12,348.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,419.78 : 30,939.50 = 12,348.57 : x
2. Step 2: Convert to fraction form
   22,419.78/30,939.50 = 12,348.57/x
3. Step 3: Cross multiply
   22,419.78x = 30,939.50 × 12,348.57
4. Step 4: Simplify right side
   22,419.78x = 382,058,519.77
5. Step 5: Solve for x
   x = 382,058,519.77/22,419.78
6. Step 6: Final answer
   x = 17,041.14